In high-performance industrial manufacturing, stress relief heat treatment is a crucial post-weld and post-machining process that ensures long-term dimensional stability and eliminates residual stresses caused during forming, welding, or casting. When working with large or heavy components, the preferred system worldwide is the bogie hearth stress relief furnace—a robust, high-capacity, and programmable thermal solution.
As leading bogie hearth stress relief furnace manufacturers in India, Maan Global Industries specializes in engineering, manufacturing, and commissioning furnaces that offer consistent temperature uniformity, safe loading of heavy components, and reliable process repeatability.
What Is a Bogie Hearth Stress Relief Furnace?
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A bogie hearth stress relief furnace is a large batch-type heat treatment system designed with a movable trolley (bogie) that carries the load into and out of the furnace chamber. It is used to relieve internal mechanical stresses in materials such as carbon steel, alloy steel, stainless steel, aluminum, cast iron, and structural assemblies.
Core Objectives of Stress Relief:
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Reduce residual stress from welding, machining, forging
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Minimize distortion during service or further processing
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Improve fatigue life and prevent cracking
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Ensure dimensional stability of precision parts
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Normalize the microstructure in weldments and castings
The bogie hearth design is ideal because it supports:
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Loading of very large, heavy, or awkwardly shaped components
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Uniform heating through multiple zones
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Easy, safe, and efficient material movement
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Precise thermal control for long soaking cycles
Why Choose a Bogie Hearth Stress Relief Furnace?
| Feature | Description |
|---|---|
| Heavy Load Handling | Bogie can carry 3 to 50 tons per cycle, perfect for pressure vessels and dies |
| Multiple Heating Zones | Uniform temperature across entire chamber volume |
| Long Soaking Capability | Ideal for stress relief which requires extended hold times (2–12 hrs) |
| Modular Construction | Available in gas-fired or electric models |
| Ease of Loading | Floor-level bogie entry for safe, crane-based component placement |
| Advanced Control Systems | PLC/SCADA integration for automatic heat cycle control |
Only experienced bogie hearth stress relief furnace manufacturers in India can build systems optimized for precise metallurgical control and energy efficiency across such large volumes.
Industries Using Bogie Hearth Stress Relief Furnaces
| Industry | Typical Components | Purpose of Stress Relief |
|---|---|---|
| Pressure Vessel | Cylinders, heads, shell assemblies | Post-weld stress reduction for ASME compliance |
| Forging | Large dies, shafts, forged rolls | Stress relief post machining |
| Defense & Aerospace | Armor plates, structural weldments | Thermal stabilization before final assembly |
| Heavy Engineering | Base frames, rotors, gear housings | Prevent warping and cracking |
| Automotive OEMs | Axle housings, crankcases | Reduce stress after welding or rough machining |
These applications demand accurate temperature uniformity and extended cycle duration, making the bogie hearth furnace the most dependable choice.
Roller Hearth Furnace Manufacturers
Design Overview – What Makes It a Bogie Hearth Furnace?
As one of the most experienced bogie hearth stress relief furnace manufacturers in India, Maan Global Industries ensures each furnace is engineered for long life, minimal maintenance, and peak thermal performance.
Mechanical Construction:
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Chamber Body: Heavy-duty mild steel frame
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Insulation: High alumina bricks + ceramic fiber module
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Bogie Trolley: Refractory-lined MS base with rail wheels
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Rail System: Twin-track or guided roller tracks for bogie travel
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Seal Design: High-temp sand or compression gasket around bogie seal
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Door: Vertical lift, pneumatically operated or geared motor
Heating Options:
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Electric:
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Elements: NiCr, Kanthal A1 or MoSi2
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Placement: Sidewalls or roof
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Gas-Fired:
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Burners: Modulating high-velocity LPG/PNG
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Flame Control: Flame sensor, UV detector, and ignition interlocks
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Technical Specifications – Bogie Hearth Stress Relief Furnace
| Parameter | Specification Range |
|---|---|
| Chamber Size (L×W×H) | 2m × 2m × 2m up to 8m × 5m × 5m |
| Load Capacity | 3 – 50 tons |
| Max Temperature | 750°C to 950°C |
| Uniformity | ±5°C across all zones |
| Power Load (Electric) | 60 kW – 350 kW |
| Burner Capacity (Gas) | 150,000 – 600,000 kcal/hr |
| Insulation Thickness | 200 – 300 mm |
| Temperature Control | PID / PLC with SCADA |
| Cycle Duration | 4 – 14 hours (based on component thickness) |
| Cooling Method | Natural in-furnace or external bay |
All furnaces are compliant with ISO, CE, and where required, AMS 2750 thermal uniformity survey standards.
Tempering Furnace for Forged Components
Bogie Hearth Annealing Furnace Manufacturers
Tempering Furnace Manufacturer for Gulf Countries
Gas Fired Furnace Manufacturer
Advanced Control Systems
Each bogie hearth furnace is fitted with an intelligent control system:
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PLC Controller (Siemens/Delta/Mitsubishi)
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HMI Panel for recipe entry, status monitoring
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Ramp-soak temperature programming
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3–6 thermocouple inputs for zone-wise monitoring
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Auto data logging with USB / SCADA output
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Alarms & Interlocks:
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Overtemperature shut-off
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Door open during cycle
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Power fail resume
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As expert bogie hearth stress relief furnace manufacturers in India, Maan Global provides customization for Industry 4.0, remote monitoring, and cycle traceability.
Gas vs. Electric Bogie Hearth Stress Relief Furnace – Comparison
| Feature | Electric Furnace | Gas-Fired Furnace |
|---|---|---|
| Heat Source | NiCr or Kanthal elements | High-velocity gas burners |
| Temperature Control | Higher precision (±3°C) | Excellent with modulating burners |
| Operating Cost | Higher electricity cost for large loads | Lower with LPG or PNG |
| Maintenance | Lower (no moving flame parts) | Burner servicing and calibration |
| Use Case | Indoor, clean applications | High-volume, heavy engineering setups |
Depending on your process parameters and utility setup, we offer either or hybrid solutions.
Case Study – Stress Relief of Welded Pressure Vessel
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Client: Boiler and pressure vessel fabricator, Tamil Nadu
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Application: Stress relief of 16-ton welded ASME shell
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Furnace Type: Gas-fired bogie hearth furnace
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Chamber Size: 5m × 4m × 3.5m
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Cycle: Ramp to 680°C, hold for 6 hrs, natural cooling
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Control: Siemens PLC with 6-point temperature feedback
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Outcome:
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Metallurgical structure normalized
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Dimensions held within 0.5 mm tolerance
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Passed X-ray and ultrasonic weld tests post treatment
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Why We Are Trusted Bogie Hearth Stress Relief Furnace Manufacturers in India
At Maan Global Industries, we are not just furnace builders—we are thermal process specialists offering:
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Fully engineered design from load study to cycle simulation
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On-site layout planning and installation support
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In-house refractory lining and bogie construction
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After-sales support, AMC, thermocouple calibration
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Export-ready manufacturing (Gulf, Africa, Southeast Asia)
When you choose us as your bogie hearth stress relief furnace manufacturers in India, you’re investing in performance, durability, and long-term ROI.
Get a Custom Bogie Hearth Stress Relief Furnace Today
Need to heat treat heavy-duty components with precision and safety?
Whether it’s forged blocks, welded pressure vessels, or castings, our bogie hearth stress relief furnace is designed to handle your toughest heat treatment challenges.
Email: mail@maanglobalindustries.com
Call / WhatsApp: +91-8882490101
